adding image chooser for cf pages 5

functions/content/images/_middleware.ts

@@ -0,0 +1,5 @@
+import assetNegotiationPlugin from "pages-plugin-asset-negotiation";
+
+export const onRequest: PagesFunction = assetNegotiationPlugin({
+	formats: ['webp'], // The formats you want to support, in order of preference. This is the default configuration and will serve a jxl image if the browser supports it (and it was found) first, followed by avif and then webp.
+});